"Omni" is the Latin prefix meaning "all, every, the whole, complete". The Omni God theory is that the god of the Christian faith (or the monotheistic/ Abrahamic faiths in general) is omniscient, omni-benevolent, and omni-potent.
Let me elaborate: this is the belief that god is all good, all knowing, and all powerful.
Well sure, that would make sense! He is GOD after all! Wrong. The Omni theory's flaw is similar to the life of a college student; if you have great grades and get enough sleep, you have no social life because your time is spent divided among the aforementioned activities. Sacrifice sleep to go to a party, you'll be tired tomorrow, OR sacrifice studying to sleep, you'll be lost in class.
If a God or godly being is all powerful and all good, he cannot be all-knowing. A god who inhabited all three traits could not see starvation, disease, rape, torture, or neglect and ignore it, because that would mean they were not truly all good. If he cannot stop these things, he is not all powerful. If he cannot see these things, he is not all-knowing.
Nowhere in the Bible, or in any scripture, is there a line that reads the claim stated above. Look around you. Do you see God in the things that are BAD as well as GOOD? Because according to faith god is responsible for all things.
Is this a god you want to praise?